Cultivating and tilling machine



June 30, 1953 w. WHARTON 2,643,599

CULTIVATING AND TILLING MACHINE Filed June 1. 1949 I 2 Sheets-Sheet lJune 30, 1953 w WHARTON 2,643,599

CULTIVATING AND TILLING MACHINE Filed June 1, 1949 2 Sheets-Sheet 2FIG-4.

M MW" 7".

Patented June 39, 1953' CULTIVATING AND TILLING MACHINE William Wharton,Hadley Wood, near'Barnet, England Application June 1, 1949, Serial No.96,590 In Great Britain February 10, 1948 1 Claim.

The present invention relates to cultivating and tilling machines of themanually controlled type, and more particularly to the tynes employed tobreak up the earth.

According to this invention a machine is furnished with a pair of tynesrotatable by a motor or other prime mover supported on a wheeledcarriage, and to this end, each of the tynes consist of a spindle havingformed integral therewith two or more longitudinally spaced plates orblades so disposed as to be inclined both to the axis of said spindleand to a plane normal thereto.

The primary function of the plates located near the lower ends of thetynes, hereinafter called the leaders, is to constitute self-travellingor feeding means whereby the tynes and the cultivator carriage on whichthey are mounted are moved forward when the leaders have been fed intothe ground, and primary function of the plates located above theleaders, hereinafter called the followers, is to dig or turn over theearth in the region of the position entered by the leader.

If desired the leadingpart of each tyne may have a secondary function ofassisting in the dig-' ging or turning over operation, whilst similarlythe followers may assist in ensuring execution of the self-travellingoperation during the latter part of each feeding movement into theearth.

In the accompanying drawings which illustrate this invention:

Figure 1 is a front elevation of a power actuated machine,

Figure 2 is a front elevation of a pair of tynes constructed inaccordance with this invention,

Figure 3 is an underneath plan thereof,

Figure 4 is a front elevation of a pair of tynes of a further modifiedform, and,

Figure 5 is an underneath plan thereof.

The machineillustrated in Figure l-comprises a wheel carriage having aframe A mounted on wheels B, a pair of tynes C rotatably mounted on theframe and a motor D, also mounted on the frame, for rotating the tynes.

As illustrated in Figures 2 and 3, the pair of tynes comprises twospindles i, i each having formed integrally therewith two longitudinallyspaced plates so formed as to be inclined both to the axis of thespindle and to a plane normal thereto, one plate 2 is positionedadjacent the lower or leading end of the spindle, a further and largerplate 3 being disposed above and approximately in the opposite sector tothat 0ccupied by the plate 2. Alternatively the plates as shown may bereplaced by longitudinally spaced plates which are constituted byhelicoidal surfaces with the leading or lowermost plates subtending asmaller arc than that of the upper plates.

In order to prevent rotation of the gear casing forming part of thecultivating carriage when driving the tynes, the latter are arranged inpairs whilst one tyne, as shown in the drawings, constitutes, the mirrorimage of the other tyne and is rotated in the opposite directionthereto.

For the purpose of preventing the accumulation of weeds around thespindles I and l of the respective tynes it is proposed to locate saidspindles in loose sleeves 6 suitably interconnected by a plate 'I toprevent the rotation of the sleeve 6.

In the construction illustrated in Figures 4 and 5, the spindles I and Iare each furnished with three plates or blades, the lowermost blades 8when the machine is'in use are in the leading position and when cuttingin a forward and downward'direction they will pull the machine forward.Whilst this action is taking place, the second pair of blades 9 arerising in a more or less horizontal position and lifting the earth.

When the leading blades 8 are rising they are lifting the earth and thesecondary blades 9 occupy a more or less perpendicular position andresist any tendency for the machine to travel backwards. 9 aretravelling forwardly and downwardly they are contributing to the forwardpropulsion of the machine, but to a lesser extent, due to the earthbeing loose in the area in which they are working resulting from thebreaking up action of the blades 8.

The third pair of blades Hi cover a somewhat Wider area than the leadingblades 8 and while said blades I!) contribute in a lesser degree to thepropulsion of the machine, they are primarily intended for breaking upclods of earth. The leading edge of the blades I0 is in the form of aspiral to avoid picking up loose weeds and the like.

What I claim is:

An earth-breaking unit for a cultivating and tillingmachine, comprisingin combination, a pair of spaced parallel downwardly extending rotarytyne spindles adapted to dig into the ground in axial direction, each ofsaid tyne spindles being formed with at least two earth-breaking platesspaced in axial direction of the corresponding tyne spindle, each platelaterally projecting from the corresponding tyne spindle at an angle tothe axis of said tyne spindle and to a plane nor- When however thesecondary blades mal thereto, the plates of one of said tyne spindlesbeing arranged opposite to and at the same distance apart as the platesof the other of said tyne spindles and disposed so as to constitutemirror images of the plates of said other tyne spindle with regard to aplane of symmetry parallel to said tyne spindles: a pair of sleeves,each sleeve of said pair of sleeves being loosely mounted for limitedaxial movement on the upper end of one of said tyne spindles above saidearthbreaking plates; and a memberrigidly connecting said pair ofsleeves so as to prevent rotation thereof whereby to preventaccumulation of weeds on the spindles.

WILLIAM WHARTON.

References Cited in the file of this patent UNITED STATES PATENTS NameDate Gardner et a1. July 20, 1926 FOREIGN PATENTS Country Date FranceDec. 9, 1921 Switzerland May 1'7, 1930 Australia Sept. 3, 1936

